package com.kuangstudy.thread.advanced;

/**
 * @author Losca
 * @date 2021/7/22 14:52
 * 信号灯法 标志位解决
 */
public class TestPc2 {
    public static void main(String[] args) {
        TV tv = new TV();
        new Player(tv).start();
        new Watcher(tv).start();
    }
}

//生产者 => 演员
class Player extends Thread{
    TV tv;
    public Player(TV tv){
        this.tv = tv;
    }
    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            if (i%2 == 0){
                this.tv.play("快乐大本营播放中");
            }else {
                this.tv.play("抖音记录美好生活");
            }
        }
    }
}

//消费者 => 观众
class Watcher extends Thread{
    TV tv;
    public Watcher(TV tv){
        this.tv = tv;
    }
    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            this.tv.watch();
        }
    }
}

class TV{
    //演员表演 观众等待 T
    //观众观看 演员等待 F
    String voice;
    boolean flag = true;
    //表演
    public synchronized void play(String voice){
        //观众观看节目等待
        if (!flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("演员表演了"+voice);
        //通知唤醒
        this.notifyAll();
        this.flag = !this.flag;
        this.voice = voice;
    }
    //观看
    public synchronized void watch(){
        //flag为真观众等待
        if (flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("观看了"+voice);
        //通知演员表演
        this.notifyAll();
        this.flag = !this.flag;

    }
}
